摘要
该文根据三峡库区某边坡的地质资料,利用三维颗粒流方法,反演了边坡各土层所对应的细观参数,建立了可以反映实际地质条件的颗粒流分析的三维模型,并对该边坡的应力状态进行了计算。在此基础上,研究了库水位波动条件下边坡体内的渗流状态并得到了相应的渗透力,结合强度折减法的思路,对各条件下坡体内部黏结接触破坏程度进行了比较,并利用三维颗粒流方法对边坡在库水位波动条件下的稳定性进行了分析,与极限平衡法的计算结果进行了对比,验证了分析方法的正确性,对于库区滑坡灾害的评价与防治,具有重要的意义。
In this paper,according to the geological data of a slope in the Three Gorges Reservoir Area,the meso parameters corresponding to each soil layer of the slope are retrieved by using the three-dimensional particle flow method.A three-dimensional model of particle flow analysis that can reflect the actual geological conditions is established,and the stress state of the slope is calculated.On this basis,the seepage state of slope under the condition of reservoir water level fluctuation is studied and the corresponding seepage force is obtained.Combined with the idea of strength reduction method,the degree of internal contact failure of slope under different conditions is compared.The stability of slope under the condition of reservoir water level fluctuation is analyzed by using the three-dimensional particle flow method.Compared with the results of limit equilibrium method,the correctness of the analysis method is verified.It has great significance to evaluate and prevent the landslide disaster in reservoir area.
作者
关岩鹏
张玉芳
刘晓丽
Guan Yanpeng;Zhang Yufang;Liu Xiaoli(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited;State Key Laboratory of Hydroscience and Engineering,Tsinghua University)
出处
《勘察科学技术》
2019年第1期20-25,57,共7页
Site Investigation Science and Technology
基金
中国铁路总公司科技研究开发计划(2016T002-C)
关键词
边坡稳定性
颗粒流
渗流
强度折减法
slope stability
particle flow
seepage
strength reduction method
